Laws of NatureThisbook isnotatextbook tobecomeacquainted with thelaws ofnature. An elementaryknowledgeaboutlawsofnature,inparticularthelawsofphysics,is presupposed. Thebookisratherintendedtoprovideaclari? cationofconcepts and properties of the laws of nature. The authors would like to emphasise that this book has been developed created as a real teamwork. Although the chapters (and in some cases parts of the chapters) were originally written by one of the two